The main Royal Oak models were being equipped with the calibre 2121 movement, which was according to the calibre 2120 produced by Audemars Piguet in 1967, the globe’s thinnest self-winding motion on the era with day indication, and an overall height of 3.05mm. The calibre 2121 was also Geared up https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/